Tool bit and holder therefor



April 14,1936. O s s 2,037,346

' TOOL BIT AND HOLDER THEREFOR 7 Filed Oct. 10 1953 7 lllmal INVENTOR. S ERSON Patented Apr. 14,1936 7 7 g UNITED1-S7IATES PATENT OFF-ICE" Ole Severs on, Shelton, Conn., assignor to The Apex Tool & Gutter Company, Inc., a corporation of Connecticut e Application October 10, 1933, Serial No. 692,916

1 Claim. (ores-10o) The invention relates to tool holders and'tool, 1 and 2, the body of the tool holder is identified by bits, particularly designed forthe metal working the numeral l0, a simple, elongated, rectangular industries and for use in machines such as body being illustrated. It will, of course, begunt planners d th ik 7 e derstood that this particular form of body is used, It is among the general objects ofthe invention merely by wa of simplified illustration. In'the to provide simplicity and efficiency in a bit and practical application of the assembly, various holder assembly, so as to preclude movement of forms of bodies may be employed.- In both forms the bit with respect to the holder and the conseof the invention here shown, the forward end quent chattering and inferiority in the finish of ofthe holder is of configuration to receive a-tool lo the surface produced by the action of the bit upon bit of co-operating design. The tool bit is identi- 10 the work. fied by the numeral II, and includes a suitably Another object is to provide an assembly havdesigned cutting tip I2, the shape or design of ing maximum strength, so as to avoid the likeliwhich is of no consequence to the present invenhood of fracture of the bit or holder, and, incition. In both instances, the holder includes a dental to this object, is the provision of a holder substantially longitudinal platform I3, over 15 assembly which provides a large mass of bit mawhich a corresponding face M of the bit lies. terial between the holder proper and its locking The forward end of the platform [3 is terminated member. in both instances by a step I5, upon which a Another object is to provide an assembly, the widened head, or seat, iii of the locking bolt ll locking member of which is adapted to force the rests. 20

bit rearwardly in firm contact with the holder The locking bolt l1 extends rearwardly through body, thus, to provide la Surface bearings fo the body and longitudinally thereof, its opposite the bit and to insure its firm securement. end being threaded and provided with a nut [8,

Other more specific objects and special features which, by adjustment, will draw the bolt back,

of the invention will be apparent from a conthus, moving the tool seat I 6 back towards the 25 sideration of the drawing taken in connection body proper. The seat l6 engages the front face with the accompanying description. of a step I9 of the tool bit, thus, forcing it se- One special feature of the invention is the procurely back, seating it against the co-operating vision of a holder the forward end of which is faces of the body. Obviously, the structure and.

configured to co-operate with a cutting bit formed adjusting means for the bolt may be modified; a 30 t0 (to-Operate therewith, d av n a locking compound bolt may be employed, or .a different member which engages a front fa f h adjusting means used. It is suggested that the bit, so that, byadjustment, it will force the bit seat l6 may be aseparate, hardened steel element, inwardly aga t t b y of the de t s thus, to add strength and rigidity to the assembly.

ing in contra-distinction t0 the more usual prac- In} that form of the invention shown in Figure tice of forcing the bit outwardly against an abut- 1 th platform 13 i t by an eutwardlwinm t e The latte! method, Obviously, clined surface 20, against which the co-operating stricts the area of the abutment, whereas, in the face 2 of t t is forced by t action of th present Structure, large bearing Surfaces are locking bolt. This arrangement provides a large 40 vided so as to give an abundant embracement mass of material between the tool seat and the 40 of the bit, and insuring both a strong and firm holder body thus, imparting maximum strength;

assembly. the inclining of the surfaces also insures firm In the draw Figure 1 is a Side elevation of seating of the bit, insuring vibrationless secureone form of t present invention ment thereof. In this form of the invention, a Figure 2 is a similar view of another modificalock against transverse movement of the bit is tion of the invention. provided by co-operating serrations on the sur- Figure 3 is a rear elevation of the bit of the faces 20 and 2|. It will be noted that this, as assembly shown in Figure 1. well as the hereinafter described means for lock- Figure 4 is a rear elevation of the bit shown in ing the bit against sidewise displacement, permits the assembly in Figure 2. sidewise adjustment of the bit before locking, so 50 Figure 5 is a side elevation of one form of lockas to permit different settings of the bit with reing element for the assembly; and spect to the longitudinal axis of the holder, thus,

Figure 6 is an end elevation of the locking eleto compensate for wear of the bit. ment shown in Figure 5. In that form of the invention shown in Figures In the forms of the invention shown in Figures 2 and 4, the front of the holder is provided, ad-

jacent to the platform l3, with a pair of spaced, oppositely-inclined surfaces 22 and 23, which, in co-operating with faces 24 and 25, insure a proper three-surface seating of the bit, which not only insures its rigidity, but divides the strain of securing and of operating. This form of the invention not only accomplishes the object herein set forth, but, in addition, accomplishes the objects and advantages of the Lindmark Patent #1,443,752.

To provide for transverse securement of the bit, this form of invention utilizes a Woodrufi key 26, which is mounted in the bolt H, or which may be formed in the holder body. The key engages slots 21 in the surface M; by selecting the slot which is engaged by the key, the setting of the bit with respect to the longitudinal axis of the holder may be varied.

A further modification of the lock-restraining, transverse movement of the bit is illustrated in Figures 5 and 6, in which the seat I6 is provided with a rib 28, formed directly thereon, and, in this instance, the slots, which are adapted to selectively receive it, are formed in the bit in that portion directly overlying the seat.

In considering this phase of the invention, it will be noted that the various modifications of such locking means are equally interchangeable between the types of bits shown, It is also suggested that transverse locking may be secured through the use of a locking screw covered by the upper overlying portion of the body, as in the manner of the screw of the Lindmark patent mentioned above. In general, it will be under stood that the invention is not restricted to the specific structural details illustrated, and that numerous changes, modifications and the full use of equivalents may be resorted to without departing from the spirit or scope of the invention as outlined in the appended claim.

What I claim is:

A tool holder including an elongated body cut away at one end to provide a bit-receiving platform and a, tool seat platform; and a longitudinally-extending draw-bolt, terminating in a tool sea-t extending forwardly of the bit-receiving platform and upon the tool seat platform; and being adapted to engage a tool bit, whereby tightening of: the bolt will cause the seat to force a tool bit rearwardly on the bit-receiving platform, said holder including an outwardly-inclined surface co-operating with the bit-receiving platform, and being adapted to receive the rear face of the bit, and to urge the bit downwardly towards the bit-receiving platform, said surface being serrated to co-operate with a similar surface of a bit to restrain the same against transverse movement.

OLE SEVERSON. 

